package com.jt.sp06.fb;

import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.io.InputStream;

@Component
public class ItemFB implements FallbackProvider {

    /*
    * 返回一个service-id,表示当前降级类针对那个后台服务的降级类
    * item -service  只针对商品服务降级
    *     *对所有的服务都应用这个降级类
    *     null 等同于*
    * */
    @Override
    public String getRoute() {
        return null;  //return *     //return "item-service"
    }

    @Override
    public ClientHttpResponse fallbackResponse(String route, Throwable cause) {

        return new ClientHttpResponse() {
            @Override
            public HttpStatus getStatusCode() throws IOException {
                return HttpStatus.INTERNAL_SERVER_ERROR;
            }

            @Override
            public int getRawStatusCode() throws IOException {
                return HttpStatus.INTERNAL_SERVER_ERROR.value();
            }

            @Override
            public String getStatusText() throws IOException {
                return HttpStatus.INTERNAL_SERVER_ERROR.getReasonPhrase();
            }

            @Override
            public void close() {

            }

            @Override
            public InputStream getBody() throws IOException {
                return null;
            }

            @Override
            public HttpHeaders getHeaders() {
                HttpHeaders h= new HttpHeaders();
                h.add("Content-Type", "application/json;charset=UTF-8");

                return h;
            }
        };
    }
}
